code: def test_videofileclip_safe_deepcopy(monkeypatch):
      """Attempts to do a deepcopy of a VideoFileClip will do a mixed copy,
      being redirected to ``__copy__`` method of ``VideoClip``, see the
      documentation of ``VideoFileClip.__deepcopy__`` for more information
      about this.
      """
      clip = VideoFileClip("media/chaplin.mp4")
  
      # patch __copy__ in the clip
      def fake__copy__():
          return "foo"
  
      monkeypatch.setattr(clip, "__copy__", fake__copy__)
  
      # this should not raise any exception (see `VideoFileClip.__deepcopy__`)
      assert copy.deepcopy(clip) == "foo"
  
file_path: moviepy/tests/test_VideoFileClip.py
imports: import copy
  import os
  import pytest
  from moviepy.video.compositing.CompositeVideoClip import clips_array
  from moviepy.video.io.VideoFileClip import VideoFileClip
  from moviepy.video.VideoClip import ColorClip
label_desc: Use image node_id 4 for calling a global function with example usage: test_videofileclip_safe_deepcopy(monkeypatch) and returns: str